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From: Tony Lindgren <tony@atomide.com>
To: Mark Brown <broonie@kernel.org>
Cc: Sebastian Reichel <sebastian.reichel@collabora.com>,
	Peter Ujfalusi <peter.ujfalusi@ti.com>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
	alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
	linux-omap@vger.kernel.org, "Arthur D ." <spinal.by@gmail.com>,
	Merlijn Wajer <merlijn@wizzup.org>, Pavel Machek <pavel@ucw.cz>,
	Jarkko Nikula <jarkko.nikula@bitmer.com>
Subject: Re: [PATCH] ASoC: cpcap: Implement set_tdm_slot for voice call support
Date: Wed, 19 Feb 2020 09:39:02 -0800	[thread overview]
Message-ID: <20200219173902.GA37466@atomide.com> (raw)
In-Reply-To: <20200218174258.GK4232@sirena.org.uk>

* Mark Brown <broonie@kernel.org> [200218 17:43]:
> On Tue, Feb 18, 2020 at 06:06:28PM +0100, Sebastian Reichel wrote:
> 
> > simple-graph-card is the current machine driver. We might have to
> > introduce a Droid 4 specific driver instead. I used simple(-graph)-card
> > instead of introducing a new driver, since the setup was simple enough
> > without modem and bluetooth. The simple card was perfect to test the CPCAP
> > codec driver. The TDM things might be complex enough to create
> > a new machine driver (as I mentioned in the original patchset
> > adding CPCAP codec support).
> 
> I tend to agree here, phones are generally one of the most complicated
> classes of system for clocking and interconnects and the CODECs they use
> often the most complex too so they're really stretching the generic
> cards.  It'd be nice to be able to handle things with generic cards but
> it's likely you'll run into issues that it'd be unreasonable to force
> you to address for system enablement.  OTOH if you manage to get one of
> the generic cards working well that'd be excellent!

Well to me it seems that we just already have all the data needed with
the graph binding and snd-soc-audio-graph-card + codec2codec support.

I don't think we have cases where the cpcap codec is not the master,
so as long as the cpcap codec knows what's going on then there
may not be a need for machine driver.

I guess the the bluetooth to modem path is the one to check to see
what provides the clocks..

Regards,

Tony

  reply	other threads:[~2020-02-19 17:39 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-11 18:10 Tony Lindgren
2020-02-12  9:17 ` Peter Ujfalusi
2020-02-12 14:46   ` Tony Lindgren
2020-02-14 13:29     ` Peter Ujfalusi
2020-02-17 23:23       ` Tony Lindgren
2020-02-18 15:15         ` Peter Ujfalusi
2020-02-18 15:32           ` Tony Lindgren
2020-02-18 16:44             ` Mark Brown
2020-02-18 17:06             ` Sebastian Reichel
2020-02-18 17:42               ` Mark Brown
2020-02-19 17:39                 ` Tony Lindgren [this message]
2020-02-19 17:46                   ` Mark Brown
2020-02-19 18:49                     ` Tony Lindgren
2020-02-19 18:53               ` Tony Lindgren

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